Hibernate Tutorial

Hibernate is an Object Relational Mapping (ORM) framework for Java, which simplifies database operations by mapping Java classes to database tables. It eliminates the need for manual JDBC code, providing cleaner and more maintainable applications.

Key features of Hibernate

• ORM Support: Maps Java objects to database tables, reducing boilerplate JDBC code.
• Database Independence: Works with multiple databases using SQL dialects.
• HQL (Hibernate Query Language): Provides database-independent, object-oriented querying.
• Caching Mechanism: Improves performance with first-level and second-level caching.

1. Hibernate Basics

Covers the foundation of Hibernate, including its architecture, lifecycle and key comparisons like JDBC vs Hibernate, JPA vs Hibernate and ORM vs JDBC.

• Introduction
• Architecture
• Lifecycle
• JDBC vs. Hibernate
• JPA vs. Hibernate
• ORM vs. JDBC

2. Core Hibernate Concepts

Explains essential Hibernate operations such as configuration, object retrieval (get() vs load()), fetching strategies, pagination and cascade types.

• Example using XML in Eclipse
• Create a Hibernate Configuration File
• get() and load() Method
• Eager/Lazy Loading
• Pagination
• Cascade Types

3. Hibernate Caching

Introduces caching mechanisms in Hibernate, including first-level and second-level cache, cache eviction and expiration for performance optimization.

• Hibernate Caching
• Enable and Implement First and Second Level Cache
• Cache Eviction
• Cache Expiration

4. Hibernate Annotations

Covers commonly used annotations (@Entity, @Table, @Id, etc.) for defining mappings and behaviors directly in Java classes.

• @Embeddable vs @Embedded
• @Entity
• @Table
• @Column
• @Id
• @GeneratedValue
• @Version
• @OrderBy
• @Transient

5. Hibernate Mapping

Explains different types of object-to-table relationships like One-to-One, One-to-Many, Many-to-Many and component mappings.

• One-to-One Mapping
• One-to-Many Mapping
• Many-to-One Mapping
• Many-to-Many Mapping
• Component Mapping

6. Hibernate with Spring Framework

Shows how to integrate Hibernate with Spring and Spring Boot for ORM, validation and database operations.

• Configuration and Create a Table in Database
• Spring ORM Example
• Integrating Hibernate and JPA
• Validation using Hibernate Validator

7. Hibernate with Database

Focuses on performing CRUD operations, table creation, HQL, native SQL, SQL dialects and JPA with MySQL integration.

• CRUD Operations
• Automatic Table Creation
• Hibernate Query Language
• Native SQL
• SQL Dialects
• Example using JPA and MySQL

8. Advanced Hibernate

Covers advanced features like Hibernate Validator, batch processing, interceptors and criteria queries for complex data operations.

• Validator with Example
• Batch Processing
• Interceptors
• Criteria Queries

9. Hibernate Log4j

Demonstrates how to configure Hibernate logging with Log4j using XML and properties files for better debugging and monitoring.

• Logging by Log4j using xml File
• Logging By Log4j Using Properties File

10. Inheritance Mapping

Explains strategies for mapping inheritance hierarchies to database tables, including table-per-hierarchy, table-per-class and table-per-subclass approaches.

• Inheritance Mapping
• Table Per Hierarchy using XML File
• Table Per Concrete Class using XML File
• Table Per Subclass Example using XML File